PI49506: NUMEROUS 307 RESPONSES FOR THE IM ENABLED PLUG-IN AND INCREASED NETWORK TRAFFIC WHEN IM PLUG-IN SWITCHES BETWEEN CONNECTORS

8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• When running with the Intelligent Management enabled plug-in any
  change to the custom properties, such as changing the trace
  specification dynamically, may result in overlaying the unique
  identification that is used to distinguish between different
  webservers by a connector.
  This may result in the connector breaking communication with
  the controller and forcing it to switch to another connector
  which will also have a similar issue with the non-unique
  identification.  The problem will continue until the web server
  is stopped and restarted.  Routing to applications will continue
  without issue but the continual switching between connectors by
  the IM enabled plug-in will increase network traffic.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Intelligent Management Plugin for    *
  *                  IBM HTTP Server.                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: When running with the Intelligent       *
  *                      Management enabled plug-in with trace   *
  *                      enabled may cause 307 errors.           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  When running with the Intelligent Management enabled plug-in
  any
  change to the custom properties, such as changing the trace
  specification dynamically, may result in overlaying the unique
  identification that is used to distinguish between different
  webservers by a connector.
  This may result in the connector breaking communication with
  the controller and forcing it to switch to another connector
  which will also have a similar issue with the non-unique
  identification (307 redirect messages). Messages about ppid or
  showing a null ppid will be signs of the issue. The problem
  will continue until the web server is stopped and restarted.
  Routing to applications will continue without issue but the
  continual switching between connectors by the IM enabled
  plug-in will increase network traffic.
  

Problem conclusion

• The Intelligent Management enabled plug-in was changed to
  preserve the unique identification of the connector so that
  communication is not broken when custom properties are updated.
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.5.8. Please refer to the Recommended Updates page
  for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBSPHERE APP S

• Fixed component ID

  5724J0800

Applicable component levels

• R850 PSY

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